Digestive system neurovasculature Flashcards
name the arterial supply of the oesophagus
ascending branches of left gastric artery
thoracic aorta
bronchial arteries
the venous drainage of oesophagus
azygos vein
hemi-azygos and accessory hemi-azygos veins
oesophangeal tributaries of the left gastric veins
lymphatic drainage of the oesophagus
to the posterior mediastinal and left gastric nodes
innervation od the oesophagus comes from branches of ?
vagus and sympathetic trunk
Superior striated muscle fibres of oesophagus is innervated by
branchial efferent from the vagus nerves
smooth muscles by which nerve
parasympathetic part of autonomic division of peripheral system.
Sensory innervation by visceral afferent fibres from
vagus , sympathetic and splanchnic.
oesophangeal plexus
Spread of branches from vagus nerves
- Fibres converge to form 2 trunks
Anterior vagal trunk (Mainly left vagus)
- Anterior surface of the oesophagus
Posterior vagal trunk (Mainly right vagus)
- Posterior surface of the oesophagus
Trunks continue through diaphragm to supply the stomach
arterial supply of the stomach
a right gastric artery from the proper hepatic artery.
left gastric artery- from the coeliac trunk
a right gastro-omental artery from the gastroduodenal artery
left gastro-omental artery from splanchnic.
innervation to stomach
anterior vagal trank from oesophangeal plexus innervates anterior surface of the stomach.
posterior vagal trunk from oesophangeal plexus
innervates the posterior surface of the stomach.
arterial supply of the small intestine.
from gastroduodenal artery - supraduodenal artery
- anterior superior pancreaticoduodenal
- posterior superior pancreatoduodenal
from the superior mesenteric artery
- anterior inferior pancreaticoduodenal artery
posterior inferior pancreaticoduodenal artery
- first jejunal branch.
Jejunum arterial supply
Does not have prominent arterial arcades and has long vasa recta.
arterial supply includes jejunal arteries from the superior mesenteric artery.
Ileum arterial supply
has prominent arterial arcades, more mesenteric. fat and has short vasa recta.
arterial supply includes ileal arteries.-
-from the superior mesenteric artery
-arterial supply also from the ileocolic artery
Where the ileum and the caecum meet.(ileocolic artery). from the superior mesenteric artery
Foregut and midgut of the GIT is supplied by?
superior mesenteric artery
Hidgut is supplied by
inferior mesenteric trunk.
colon ( arteries supply)
ascending colon is supplied by the ileocolic artery branches.
- anterior Anterior caecal artery from ileocolic artery
- Posterior caecal artery from ileocolic artery
AND
Right colic artery from superior mesenteric artery
the transverse colon is supplied by ?
midgut/ 2/3 of the transverse colon is supplied by -the right colic artery from the superior mesenteric artery.
rest of the transverse colon is supplied by the middle colic artery from the superior mesenteric
the rest the of the descending and sigmoid intestine is supplied by the left colic and sigmodial artery from the inferior mesenteric artery.
Rectum and anal canal (Arterial)
Superior rectal artery
- From the inferior mesenteric artery
Middle rectal artery
- From the internal iliac artery-end as internal pudendal artery
Inferior rectal artery
- From the internal pudendal artery
- From the internal iliac artery
venous drainage od the intestine
they all drain via the portal vein.
-tributaries names similar to the arteries.
if the portal vein is blocked then via inferior vena cava.
superior mesenteric Drains straight to portal vein
inferior mesenteric via splanchnic vein then to portal vein
The sympathetic innervation of the gastrointestinal system
Abdominal prevertebral plexus surrounds the aorta
- Continuous with major branches.
3 major plexus divisions exist
- coeliac plexus
- coeliac and aortorenal ganglion
-superior mesenteric ganglion - Aortic plexus
-inferior mesenteric ganglion
3 superior hypogastric plexus.
